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MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 24 of 68 flowserve.com
f) Compare the “adjusted Figure 4-16 loads” to the
values shown in figure 4-15. The lower of these
two values should be used as the adjusted figure 4-
15 values. (The HI standard also asks that figure 4-
15 loads be reduced if figure 4-17 or 4-18 values
are lower. Flowserve does not follow this step.)
g) Calculate the applied loads at the casing flanges
according to the coordinate system found in
figure 4-13. The 12 forces and moments possible
are Fxs, Fys, Fzs, Mxs, Mys, Mzs, Fxd, Fyd, Fzd,
Mxd, Myd and Mzd. For example, Fxd
designates Force in the “x” direction on the
discharge flange. Mys designates the Moment
about the “y”-axis on the suction flange.
h) Figure 4-14 gives the acceptance criteria
equations. For long coupled pumps, equation
sets 1 through 5 must be satisfied. For close
coupled and C-face pumps, only equation sets 1
and 2 must be satisfied.
i) Equation set 1. Each applied load is divided by
the corresponding adjusted figure 4-15 value.
The absolute value of each ratio must be less
than or equal to one.
j) Equation set 2. The summation of the absolute
values of each ratio must be less than or equal to
two. The ratios are the applied load divided by
the adjusted figure 4-16 values.
k) Equation sets 3 and 4. These equations are
checking for coupling misalignment due to nozzle
loading in each axis. Each applied load is divided
by the corresponding adjusted load from figure 4-17
and 4-18. The result of each equation must be
between one and negative one.
l) Equation set 5. This equation calculates the total
shaft movement from the results of equations 3
and 4. The result must be less than or equal to one.
Figure 4-11: Casing material correction factors
Material Group No.
1.0 1.1 2.1 2.2 2.4 2.8 3.2 3.4 3.5 3.7 3.8 3.17 Ti Cr
Austenitic steels Nickel and nickel alloys
Temp
Temp
DCI
Carbon
Steel
Type
304
and
304L
Type
316
and
316L
Type
321
CD-
4MCu Nickel Monel Inconel
Hast
B
Hast
C
Alloy
20
Ti,
Ti-
Pd,
Zr
High
Chrome
-18 to
171
340
-129 -200 – – 1.00 1.00 1.00 – 0.50
–
–
–
–
0.83
–
–
-73 -100
– –
1.00 1.00 1.00 1.00 0.50 0.83 0.93 1.00 1.00 0.83 0.89 –
-29 -20 0.89 1.00 1.00 1.00 1.00 1.00 0.50 0.83 0.93 1.00 1.00 0.83 0.89 0.65
38 100 0.89 1.00 1.00 1.00 1.00 1.00 0.50 0.83 0.93 1.00 1.00 0.83 0.89 0.65
93 200 0.83 0.94 0.83 0.86 0.93 1.00 0.50 0.74 0.88 1.00 1.00 0.72 0.86 0.65
150 300 0.78 0.91 0.75 0.78 0.83 0.92 0.50 0.69 0.82 1.01 1.01 0.65 0.81 0.65
205 400 0.73 0.88 0.69 0.72 0.69 0.85 0.50 0.67 0.77 0.98 0.98 0.58 0.69 0.65
260 500 0.69 0.83 0.63 0.67 0.64 0.80 0.50 0.66 0.74 0.92 0.92 0.54 0.57
–
315 600 0.65 0.76 0.60 0.63 0.60 0.77 0.50 0.66 0.74 0.84 0.84 0.50 0.45
–
344 650 0.63 0.74 0.60 0.62 0.60
– –
0.66 0.73 0.82 0.82
–
0.39
–
370 700 – 0.74 0.59 0.60 0.58
– –
0.66 0.73 0.79 0.79
–
0.33
–